src/southbridge/amd/amd8151/amd8151_agp3.c

   1 /*
   2  *  Copyright 2003 Tyan
   3  *
   4  *      Author: Yinghai Lu
   5  */
   6 #include <console/console.h>
   7 #include <device/device.h>
   8 #include <device/pci.h>
   9 #include <device/pci_ids.h>
  10 #include <device/pci_ops.h>
  11
  12 static void agp3bridge_init(device_t dev)
  13 {
  14         uint32_t dword;
  15
  16         dword = pci_read_config8(dev, 0x04);
  17         dword |= 0x07;
  18         pci_write_config8(dev, 0x04, dword);
  19
  20         return;
  21 }
  22
  23 static struct device_operations agp3bridge_ops  = {
  24         .read_resources   = pci_bus_read_resources,
  25         .set_resources    = pci_dev_set_resources,
  26         .enable_resources = pci_bus_enable_resources,
  27         .init             = agp3bridge_init,
  28         .scan_bus         = pci_scan_bridge,
  29 };
  30
  31 static struct pci_driver agp3bridge_driver __pci_driver = {
  32         .ops    = &agp3bridge_ops,
  33         .vendor = PCI_VENDOR_ID_AMD,
  34         .device = 0x7455,
  35 };
  36
  37
  38 static void agp3dev_enable(device_t dev)
  39 {
  40         uint32_t value;
  41
  42         //  AGP enable
  43         value = pci_read_config32(dev, 0xa8);
  44         value |= (1<<8);
  45         pci_write_config32(dev, 0xa8, value);
  46
  47         //  linkA 8bit-->16bit
  48         value = pci_read_config32(dev, 0xc4);
  49         value |= (11<<24);
  50         pci_write_config32(dev, 0xc4, value);
  51
  52         //  linkA 200-->600
  53         value = pci_read_config32(dev, 0xcc);
  54         value |= (4<<8);
  55         pci_write_config32(dev, 0xcc, value);
  56
  57
  58         value = pci_read_config32(dev, 0x4);
  59         value |= 6;
  60         pci_write_config32(dev, 0x4, value);
  61 }
  62
  63 static struct device_operations agp3dev_ops = {
  64         .read_resources   = pci_dev_read_resources,
  65         .set_resources    = pci_dev_set_resources,
  66         .enable_resources = pci_dev_enable_resources,
  67         .init     = 0,
  68         .scan_bus = 0,
  69         .enable   = agp3dev_enable,
  70 };
  71
  72 static struct pci_driver agp3dev_driver __pci_driver = {
  73         .ops    = &agp3dev_ops,
  74         .vendor = PCI_VENDOR_ID_AMD,
  75         .device = 0x7454,
  76
  77 };